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132 products

Showing 97 - 120 of 132 products

Showing 97 - 120 of 132 products
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FREE 2" Isolation Valve*FREE Delivery*
15,000 Litre Water Tank in Black15,000 Litre Water Tank in Black
15000 Litre Water Tank
Sale price£1,850.00 exc. VAT
FREE Delivery*
15000 Litre Underground Water Tank15000 Litre Underground Water Tank Lifting Points
15000 Litre Underground Water Tank
Sale price£3,600.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 15,000 Litre Small Footprint Water TankSlimline 15000 Litre Endurmaxx Water Tank in Natural Colour
FREE 2" Isolation Valve*FREE Delivery*
20,000 Litre Water Tank20,000 Litre Water Tank Lid Area
20000 Litre Water Tank
Sale price£2,150.00 exc. VAT
FREE 2" Isolation Valve*
WRAS Approved 20000 Litre Water TankWRAS Approved 20000 Litre Water Tank in Natural Colour
Enduramaxx 20000 Litre Water Tank
Sale price£2,045.00 exc. VAT
FREE Delivery*
20000 Litre Underground Flat/Shallow Dig Water Tank - Graf Platin XL20000 Litre Underground Flat/Shallow Dig Water Tank - Graf Platin XL
FREE 2" Isolation Valve*
Enduramaxx 22,000 Litre Water TankEnduramaxx 22000 Litre Water Tank in Natural Colour
Enduramaxx 22000 Litre Water Tank
Sale price£2,575.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 25000 Litre Slimline Water TankEnduramaxx 25000 Litre Water Tank Slimline
FREE 2" Isolation Valve*FREE Delivery*Save £360.00
25,000 Litre Water Tank25,000 Litre Water Tank Lid Area
25000 Litre Water Tank
Sale price£2,695.00 Regular price£3,594.00 exc. VAT
FREE Delivery*
25000 Litre Underground Flat/Shallow Dig Water Tank - Graf Platin XXL25000 Litre Underground Flat/Shallow Dig Water Tank - Graf Platin XXL
FREE 2" Isolation Valve*
Enduramaxx 26000 Litre Water Tank in Black26000 Litre Water Tank From Enduramaxx in Natural Colour
Enduramaxx 26000 Litre Water Tank
Sale price£2,650.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 30000 Litre Water TankEnduramaxx 30,000 Litre Water Tank in Natural Colour
Enduramaxx 30000 Litre Water Tank
Sale price£3,250.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 45000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 45000 Litre Water Tank
Sale price£5,475.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 50000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 50000 Litre Water Tank
Sale price£6,650.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 60000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 60000 Litre Water Tank
Sale price£6,850.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 75000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 75000 Litre Water Tank
Sale price£9,975.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 90000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 90000 Litre Water Tank
Sale price£10,450.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 100000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 100000 Litre Water Tank
Sale price£13,450.00 exc. VAT
FREE 2" Isolation Valve*
Enduramaxx 120000 Litre Water TankFree Ball Valve For Enduramaxx 30,000 Litre Water Tank
Enduramaxx 120000 Litre Water Tank
Sale price£13,950.00 exc. VAT
FREE Delivery*
10000 Litre Underground Water Tank - Graf Carat XL10000 Litre Underground Water Tank - Graf Carat XL
FREE Delivery*
16000 Litre Underground Water Tank - Graf Carat XXL16000 Litre Underground Water Tank - Graf Carat XXL
FREE Delivery*
22000 Litre Underground Water Tank - Graf Carat XXL22000 Litre Underground Water Tank - Graf Carat XXL
FREE Delivery*
26000 Litre Underground Water Tank - Graf Carat XXL26000 Litre Underground Water Tank - Graf Carat XXL
The main difference lies in the material and certification. Potable tanks are made from food-grade, WRAS-approved materials safe for drinking water. Non-potable tanks are made from standard high-quality polyethylene that may be more porous or lack the specific linings required for human consumption, making them suitable only for 'service' water tasks like irrigation or cleaning.
These tanks are incredibly versatile and are used for rainwater harvesting, garden irrigation, livestock watering, commercial pressure washing, dust suppression on construction sites, and toilet flushing systems in off-grid or eco-friendly buildings.
Yes, non-potable tanks are excellent for watering plants and crops. Harvested rainwater is often preferred for gardening as it lacks the chlorine found in mains water. However, the water should not be used for drinking or washing food that will be eaten raw without further treatment.
Most of the tanks in this specific collection are designed for above-ground use and are UV-stabilized to withstand sunlight. If you require a tank to be buried, you should look at our dedicated 'Underground Water Tanks' range, which features reinforced ribbing to handle ground pressure.
Our non-potable range is vast, starting from small 100-litre garden tanks and extending up to massive 30,000-litre industrial units. For even larger requirements, multiple tanks can be linked together using a manifold kit.
If you plan to transport the water in a van or trailer, a 'baffled' tank is highly recommended. The internal baffles reduce water surge (sloshing), which prevents the weight of the water from shifting suddenly and potentially causing the vehicle to lose control.
Maintenance is similar to potable tanks but focuses more on preventing debris and algae. Because the water isn't for drinking, slight algae growth is less of a health risk, but it can still clog pumps and filters. We recommend using a dark-coloured tank (like black or dark green) to block sunlight and reduce algae growth.
No. Once a tank has been manufactured and used for non-potable purposes, it cannot be certified for drinking water. If there is any chance you might need the water for human consumption in the future, it is safer to invest in a WRAS-approved potable tank from the start.